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DebunkedThe PolygraphThe instrument popularly called a lie detector, which records breathing, blood pressure, pulse and skin conductance dur…

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The library

Capsules

1,028 capsules, each one classified by the strength of its evidence.

All1,028Fact599Proven130Theory89Hypothesis71Contested90Debunked48
geography236biology88physics67history54medicine45astronomy33psychology26mathematics26chemistry20engineering20astrophysics19neuroscience19anthropology18art18
Filtered bybiologyClear all

Results

Showing 81 to 88 of 88

NewestMost votedA to Z
Fact· Empirical

Nile Crocodile

The Nile crocodile, Crocodylus niloticus, is Africa's largest freshwater predator and the second largest crocodilian after the saltwater crocodile.…

byCapsule
0 votes0 reviews
Feb 26, 2026
Hypothesis

Abiogenesis: The Origin of Life

Abiogenesis is the natural process by which life is thought to have arisen from non living matter, such as simple chemical compounds. How life first…

byCapsule0 votes0 reviewsFeb 15, 2026
Theory· Scientific

Evolution by Natural Selection

Evolution by natural selection is the scientific theory that explains how the diversity of life arose and continues to change. It holds that…

byCapsule0 votes0 reviewsFeb 14, 2026
Fact· Empirical

Great White Shark

The great white shark, Carcharodon carcharias, is the largest predatory fish, reaching about six metres. It is warm-blooded in a limited and…

byCapsule0 votes0 reviewsFeb 14, 2026
Fact· Empirical

Giraffe

The giraffe is the tallest living land animal, at up to about five and a half metres. Almost everything distinctive about it follows from that…

byCapsule0 votes0 reviewsFeb 14, 2026
Fact· Empirical

Kangaroo

Kangaroos are large marsupials of the family Macropodidae, endemic to Australia and New Guinea. They are the only large animals that hop as their…

byCapsule0 votes0 reviewsFeb 11, 2026
Fact· Empirical

Penguin

Penguins are flightless seabirds of the southern hemisphere, around eighteen species, which gave up flight in the air for flight underwater. They are…

byCapsule0 votes0 reviewsFeb 5, 2026
Contested

Are Viruses Alive?

Whether viruses count as living organisms is a question biologists have debated for over a century, and there is still no settled answer. Viruses sit…

byCapsule0 votes0 reviewsJan 25, 2026
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